Lizard

Endangered Iguanas Hatch at SDZ Safari Park

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The population of critically endangered Jamaican Iguanas is on the rise, thanks in part to the efforts of researchers at the San Diego Zoo Institute for Conservation Research’s Kenneth and Anne Griffin Reptile Conservation Center (an off-exhibit breeding facility at the San Diego Zoo Safari Park).

Since September, four Jamaican Iguanas have hatched here from eggs of two different pairs of adult Iguanas. One egg from the first clutch hatched September 4, and three eggs from the second clutch hatched October 6, 7 and 11. With the addition of these four new animals, a total of 11 Jamaican Iguanas now reside at the Park’s Reptile Conservation Center.

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Jamaican_003_LGPhoto Credits: Ken Bohn/ San Diego Zoo Safari Park

The baby Iguanas now have a much lighter gray color overall, with more pronounced striping than they will have when they become adults. As they grow, their body will become dark gray and rust-colored, with greenish-blue highlights. Jamaican Iguanas continue to grow over their entire lifetime, and they can eventually reach up to three feet in length and weigh up to 15 pounds.

San Diego Zoo Global first received a group of Jamaican Iguanas in 1996: three males and three females. The first successful hatching of this critically endangered lizard occurred in 2013, with the birth of a female that still lives at the Reptile Conservation Center. She will become part of the center’s breeding program when a suitable mate can be found for her.

"I'm very pleased with the results of our work this year,” said Jeff Lemm, conservation program specialist at the San Diego Zoo Institute for Conservation Research. “Our job is to help make the animals successful at reproducing through the husbandry we provide, and it's fantastic that we are starting to achieve these goals."

The Jamaican Iguana (Cyclura collei) is found only in the tropical dry forests of the Hellshire Hills outside of Kingston, Jamaica. They are Jamaica’s largest native species and believed to be extinct in the 1940s. However, in 1990, a pig hunter’s dog found a live specimen and the Iguana was brought to the Hope Zoo in Kingston, Jamaica. That same year, a survey of the Hellshire Hills found a small population of fewer than 100, and researchers began a large-scale program to try to save this Iguana from extinction. Due to deforestation and threats from non-native animals (including mongooses, cats, dogs and pigs), the Jamaican Iguana is currently listed as “Critically Endangered” on the International Union for Conservation of Nature (IUCN) Red List of Threatened Species.


Rare Baby Chameleons Fit on Your Fingertip

Baby chameleons hatch in Chester Zoo first. Pictured with lead herpetology keeper Adam Bland  (6)

Three colorful Chameleons, so tiny they each fit on the end of a finger, have hatched at Chester Zoo.

This is the first time the zoo has successfully bred the species, known as Cameroon Two-horned Mountain Chameleons. The first in a clutch of three eggs, laid by a female named Ruby, hatched in late August with two more following soon after.

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Baby chameleons hatch in Chester Zoo first. Pictured with lead herpetology keeper Adam Bland  (3)Photo Credit: Chester Zoo

Lead Herpetology Keeper Adam Bland said, “These Chameleons have a really unusual appearance. They’re sometimes referred to as the Cameroon Sailfin, owing to a sail-like flap of skin running along their backs. The males of the species boast two large horns just above their upper jaw which they use for jousting with other males.”

“Even as babies they have their iconic large eyes which, at their current size, may appear a little too big for their body. However these give them 360° arc vision so they can see in two different directions at once and look out for predators,” added Bland.

As the name suggests, the Cameroon Two-horned Mountain Chameleons live at altitude in the West African nation of Cameroon. These lizards are usually green in color, but males turn blue when trying to attract a mate.

Dr Gerardo Garcia, Curator of Lower Vertebrates and Invertebrates at the zoo, added, “These Chameleons are thought to live in just 10 locations in the highlands of Cameroon as they only thrive at a very particular altitude (between 700m and 1,900m), in very specific forest habitat. As much of the highlands of Cameroon comprise of savannah and grasslands, it really restricts their range. Sadly, with that already small amount of available habitat being affected by human activity - degradation, agriculture and climate change - it’s making these Chameleons more and more vulnerable.

“Another big threat to their survival is the international pet trade. Thousands of live Chameleons have been taken from the wild and traded from Cameroon in the last dozen years,” Garcia added. The species is listed as Near Threatened on the IUCN Red List.

See more photos of the little lizards below!

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Tulsa Zoo’s Reptile Department Celebrates Hatchlings

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Tulsa Zoo’s Reptile and Aquatics department recently announced the hatching of six Desert Iguanas. The little lizards are currently on display in the Zoo’s Conservation Center reptile nursery.

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4_20287207_10150878245034996_491240831625000089_oPhoto Credits: Matt Yockey and Ruth Holland / Tulsa Zoo

The Desert Iguana (Dipsosaurus dorsalis) is one of the most common lizards. It is native to the Sonoran and Mojave deserts of the southwestern United States and northwestern Mexico. They are also found on several Gulf of California islands.

The Desert Iguana is a blunt, medium-sized lizard that grows to a maximum size of about 61 cm (24 in), including the tail. They are grayish tan to cream in color, with a light brown reticulated pattern on their backs and sides. The belly is pale. During the breeding season, the sides become pinkish in both sexes.

Their preferred habitat is largely contained within creosote bushes on mainly dry, sandy desert scrubland below 1,000 m (3,300 ft). They can also be found in rocky streambeds. In the southern portion of its range, this lizard lives in areas of arid subtropical scrub and tropical deciduous forest.

The Desert Iguana can withstand high temperatures and are out and about after other lizards have retreated into their burrows. If threatened, they will scamper into a shrub and go quickly down a burrow. Burrows are usually dug in the sand under bushes like the creosote. They are also known to use burrows of kit foxes and desert tortoises.

Mating takes place in the early spring. One clutch of eggs is laid each year, and each clutch will have three to eight eggs.

Desert Iguanas are primarily herbivorous, eating buds, fruits and leaves of many annual and perennial plants.

Birds of prey, foxes, rats, long-tailed weasels, some snakes, and humans are all known predators of this lizard and their eggs. The Desert Iguana is currently classified as "Least Concern" on the IUCN Red List of Threatened Species.

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Cotswold Wildlife Park First in UK to Breed Rare Lizard

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Cotswold Wildlife Park has become the first zoological collection in the UK to breed the rare Chinese Crocodile Lizard.

The sex of the newborn is currently unknown, and the baby Lizard is currently off-show in the specialist Reptile rearing room. However, visitors to Cotswold can see the adults in their enclosure in the Reptile House. In the future, the newest Lizard will go on to be part of a breeding programme for this rare species.

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4_Chinese Crocodile Lizard baby 1 (photo Debbie Ryan)Photo Credits: Cotswold Wildlife Park (Images: 1,2,5,6) / Debbie Ryan (3,4,8) / Callum O'Flaherty (7) 

The Chinese Crocodile Lizard (Shinisaurus crocodilurus) is semiaquatic and found only in the cool forests of the Hunan, Guangxi and Guizhou Provinces of southern China, and the Quảng Ninh Province in northern Vietnam. Very little is known about this rare species. It was first collected in 1928, and it remains the most recently named Lizard genus.

The species is viviparous, meaning it gives birth to live young. It has a gestation period of approximately nine months and litters consist of between 1-12 young.

In the wild, it frequently spends hours, motionless, perched on rocks or branches above slow-moving streams and ponds.

Due to habit destruction, illegal poaching, capture for the pet trade, and local consumption, population numbers of this Lizard are under serious threat. Unfortunately, this species is still widely used in traditional Chinese medicine. The Lizard’s ability to remain immobile for hours, occasionally days, led to the belief that it could cure insomnia. In China they are also known as “the sleeping serpent”.

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Reptile Hatchlings at Zoo Atlanta Are ‘Lucky 13’

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Thirteen proved to be a lucky number for one of the planet’s rarest reptile species! Zoo Atlanta has had their most successful season ever for hatching Guatemalan Beaded Lizards. The Zoo welcomed a total of 13 hatchlings this spring, which is a record for Zoo Atlanta.

Zoo Atlanta is one of only four zoos in the U.S. housing Guatemalan Beaded Lizards. Since the arrival of the Zoo’s first hatchling in 2012, a total of 35 have successfully hatched in subsequent years.

Guatemalan Beaded Lizards lay their eggs in fall and early winter. The 13 new hatchlings began emerging from their eggs on March 31, 2017.

“Every animal birth at Zoo Atlanta is important, but it is especially so when we consider that there are so few Guatemalan Beaded Lizards in the wild. This species is not only exceptionally rare but challenging to reproduce,” said Hayley Murphy, DVM, Vice President of Animal Divisions. “We are very proud to see Zoo Atlanta leading the way in helping to ensure a future for this species and in sharing what we have learned with our partners in the U.S. and Guatemala.”

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4_guatemalanbeadedlizard_hatchlings2017_egg_ZA_9372Photo Credits: Zoo Atlanta

The Guatemalan Beaded Lizard (Heloderma charlesborgeti) is an example of an animal most Americans would have no awareness of were it not for zoological populations.

As reclusive as they are rare, the lizards are found only in the Motagua Valley in Guatemala, where they are believed to number fewer than 200 in the wild. The species and its close relatives, which include the Gila Monster of the southwestern United States, are the only known venomous lizards.

The Beaded Lizard is a specialized vertebrate nest predator, feeding primarily on bird and reptile eggs. It is semi-arboreal and can be found climbing deciduous trees in search of prey when encountered above ground. It occasionally preys upon small birds, mammals, frogs, lizards, and insects.

The lizard species becomes sexually mature at six to eight years and mates between September and October. The female will lay her clutch of two to 30 eggs between October and December, and the clutch will hatch the following June or July.

Young lizards are seldom seen, emerging from underground at two to three years of age after gaining considerable size.

Although Guatemalan Beaded Lizards spend most of their lives below ground and rarely encounter humans, wild populations face serious challenges because of habitat loss and illegal trade. The species faces additional pressures from fear-based killing resulting from long-held myths that the lizards have supernatural powers.

Zoo Atlanta has worked with the Foundation for the Endangered Species of Guatemala on Conservation Heloderma, which works to purchase and protect Guatemalan Beaded Lizard habitat; combat black-market trade; promote local education; and improve the lives of people living in communities that share the lizards’ native range.

The properties of the Guatemalan Beaded Lizard’s venom, which is used only in self-defense and is not used to capture prey, have only recently become known to science. Unlike most lizard species, the Guatemalan Beaded Lizard has a high aerobic capacity and is able to stabilize its blood sugar levels during contrasting periods of eating and fasting, thanks to a unique hormone. This hormone has been synthesized by pharmaceutical companies in the treatment of human diabetes.

For more information on conservation programs at Zoo Atlanta, visit: www.zooatlanta.org/conservation

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Fourteen Thorny Devils Hatch at Alice Springs

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The Alice Springs Desert Park, in the Northern Territory, Australia, has successfully produced fourteen new resident Thorny Devil Lizards.

The recent hatching of the fourteen healthy Thorny Devils (Moloch horridus), also known as Thorny Dragon, adds to the Desert Park’s diverse range of wildlife currently available for viewing.

Specialist Keeper, Invertebrates and Reptiles, Pete Nunn said that the Desert Park is thrilled to have such an extensive collection of Thorny Devils in captivity. “Thorny Devils are not normally kept, let alone bred at most zoos and wildlife parks around Australia,” he said. “The Thorny Devil usually lives in the arid scrub land and desert that covers most of Central Australia. For example, it inhabits the Tanami and Simpson Desert in the deep interior.”

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4_P1000797Photo Credits: Alice Springs Desert Park

Over time the Thorny Devils have evolved and adapted to the environment they live in.

“Thorny Devils live on a diet of nothing but small black ants. They feed in the cooler mornings and late afternoon,” Mr. Nunn continued. “When they locate a trail of ants they lick them up with their short, sticky tongue. Thorny Devils might eat a thousand or more ants in a single meal.”

When it comes to hydration, Thorny Devils collect moisture in the dry desert by the condensation of dew on their bodies at night.

“This dew forms on its skin, and then it is channeled to its mouth in microscopic grooves between its spines,” said Mr. Nunn.

The hatchlings took 98 days to incubate and weighed in at a tiny two grams.

From the fourteen total Thorny Devils that hatched, four are on display at the Alice Springs Desert Park’s nocturnal house, sand country exhibit.

For further details and park information visit: www.alicespringsdesertpark.com.au


Reptile Hatchings at San Diego Zoo Boost Rare Species

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Two rare reptile species native to two delicate island ecosystems—the Black Tree Monitor, native to the Aru Islands off the coast of Papua New Guinea; and the Mossy Leaf-tailed Gecko, native to Madagascar—have reproduced at the San Diego Zoo and offer hope for two little-known, yet important species.

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Monitor_001_WebPhoto Credit:  San Diego Zoo

Four Black Tree Monitor babies hatched from eggs laid in January and are the first ever hatched at the zoo.  The young lizards weigh about two-fifths of an ounce each, and are doing well.

Black Tree Monitors live in the hot, humid forests and mangrove swamps of the Aru Islands off the coast of Papua New Guinea. They are dependent on the forest canopy to survive, but most of the regional forest on the Aru Islands has already been lost. Other threats to the species include the pet trade and non-native predators, such as foxes and cats. With the threats the Black Tree Monitor faces in the wild, establishing insurance populations in accredited zoos will help ensure the survival of the species.

Mossy Leaf-tailed Geckos face similar challenges in the wild, and have also experienced recent breeding success. The zoo received a confiscated group of mossy Leaf-tailed Geckos in 2010. The geckos have since produced eight hatchlings, with several generations now thriving at the zoo.

Leaf-tailed Geckos have evolved to resemble leaves, blending into their forest surroundings to avoid predators and better ambush their insect prey. However, more than 80 percent of Madagascar’s forests have been decimated by logging, agriculture, housing development and other human activity, threatening the future of the species. With these ongoing threats, keeping healthy satellite populations outside of Madagascar is increasingly important as a safeguard against extinction.


Thorny Devil Hatches at Alice Springs Desert Park

11010557_786505621426797_2790897292437850506_nAlice Springs Desert Park, in NT, Australia, recently welcomed a Thorny Devil hatchling in the Park’s Nocturnal House.

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11041663_786507168093309_8590891587676102699_nPhoto Credits: Alice Springs Desert Park

The Thorny Devil (also known as a ‘Thorny Dragon’, ‘Thorny Lizard’, or the ‘Moloch’) is a species that is native to the dry desert and shrub land of Australia. The average adult reaches a length of 15 to 20 cm (5.9 to 8 inches), and will weigh about the same as a mouse (a max of about 95 g or 3.4 oz). They are known to have an average life span of 12 to 20 years.

Thorny Devils are a difficult species to breed in captivity because they will only breed when in excellent condition, which requires keeping them very well fed on a diet of ants throughout winter, until ready for spring breeding. Incubation at the Alice Springs Desert Park took 3 months, at 29 degrees. Time period for incubation varies according to temperature.

Hatchlings are completely independent and soon after hatching, they start eating ants. Surprisingly, it will take 2 years for the young to reach full adult-size.

As with many species of lizard, the female Thorny Devil is slightly bigger than the male and tends to be slightly paler in color. All Thorny Devil individuals tend to change from a paler to a darker color when they cool down.

The Thorny Devil also has a pretend head at the back of its neck which is used to mislead oncoming predators. It will dip its real head down, when threatened, and will therefore have a slight advantage on other animals.

The new addition, at Alice Springs Desert Park, is an exciting achievement for their reptile team. The last time Thorny Devils bred at the Desert Park was in 2008.


Look Who Just Hatched!

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A tiny Carpet Chameleon has just emerged from its egg at Omaha’s Henry Doorly Zoo!  Weighing about the same as four toothpicks, this little Lizard is one of seven Carpet Chameleons to hatch between January 12 and February 12 at the zoo.

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Photo Credit:  Omaha's Henry Doorly Zoo

Native to Madagascar, Carpet Chameleons are one of the smallest true Chameleons.  In their forest habitat, Carpet Chameleons sport dark colors in the mornings as they warm themselves in the sun.  Once they are warmed up, they traverse tree branches in search of flies, grasshoppers, and insect larvae.  Food is captured on the tips of the Chameleons’ sticky tongues, which can be as long as the Lizards themselves (up to 10 inches). 

At just three months of age, carpet Chameleons reach sexual maturity and begin breeding.  Though many species in Madagascar are threatened with extinction, these Chameleons are abundant.

See more photos of the Chameleon below.

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Lots of Lizards for Staten Island Zoo

Crocs_7_3Seven rare Chinese Crocodile Lizards recently were born at the Staten Island Zoo.  This may seem like a large litter, but the last litter included 11 babies!

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Photo Credit:  Staten Island Zoo

Chinese Crocodile Lizards are native to China and Vietnam, where they live in cool forests. These Lizards are semiaquatic, often sitting in streams or among vegetation, awaiting passing insects, worms, and tadpoles. Unlike most reptiles that lay eggs, they give birth to live young.

Due to extensive habitat destruction and capture for the pet trade, Chinese Crocodile Lizards are listed as Endangered by the International Union for Conservation of Nature.  Just over 1,000 of these Lizards are thought to remain in the wild.

See more photos of the Lizard hatchlings below.

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